Ukulele Tuner
Which string?
♭ 50¢in tune50¢ ♯
Tap a peg to lock the tuner to one string; otherwise it guesses.
Tuning: auto-detect
While it is listening the tuner asks your device to keep the screen on. The microphone switches itself off when you leave the tab or after a few minutes of silence.
Reference tones
Play a string's pitch through your speakers and tune by ear.